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up to mischief

up to mischief

3.9
Doing playful, slightly naughty things that are not serious
  • idiom
  • Informal
translation icon : haciendo travesuras
  • She loved to see her little brother up to mischief, as it always made her laugh.
  • get up to mischief

Examples

  • He's been up to mischief, that's for sure.

  • The children were frequently up to mischief, playing pranks on their neighbors.

  • There were always plenty of things to do and always up to mischief, going places where you shouldn't go.

  • I can tell by her eyes she's up to mischief.

    Fiction book (1999)
  • She's here to catch naughty boys up to mischief.

  • Who's to say they are not deflecting attention away from themselves and are up to mischief?

    Blog text (14)
  • "The minions of Atoris the Evil," a voice answered, "doubtless up to mischief."

    Fiction book (1991)
  • The parents of Emily and Ned sensed that their children were concealing something from them and suspected that the two were up to mischief of some kind.

    Fiction book (1996)
  • Whenever the dog is left alone, you can be sure he is up to mischief in the backyard.

Synonyms

mischievous
vsup to mischief
19 3.5

Causing playful trouble that is not harmful

is used for being actively engaged in mildly troublesome behaviour
up to something
vsup to mischief
  • Informal
19 7.0

Doing something secret that may be wrong or harmful

is more clearly playful and not usually secretive or suspicious
silly
vsup to mischief
  • Informal
2 7.4

A child who acts in a foolish or playful way

is focused on playful mild trouble rather than mere foolishness
to lark about
vsup to mischief
  • UK
1 8.1

To play and joke in a silly way and sometimes cause trouble

is about mild playful troublemaking rather than loud foolishness
up to some devilment
vsup to mischief
  • UK
9.6

Doing small naughty things for fun

is centered on playful mildly troublesome action rather than serious malice

Antonyms

452 1.4

Calm and focused, not playful or joking

25 2.8

Polite and calm around other people

How Mischievous

troublesome
49 3.9
up to mischief
  • Informal
3.9
cheeky
  • Informal
33 4.8
playful
79 1.6
well-behaved
25 2.8

Surface Forms

up to mischief positive

Morphology

up + to + mischief

The noun 'mischief' clearly denotes playful or troublesome behavior, so that constituent is transparent. However, the relational phrase 'up to' meaning 'engaged in' is a conventionalized pattern that is not fully predictable from the literal senses of 'up' + 'to', so a learner who knows the words may only partly infer the full idiomatic sense without prior exposure.

Etymology

Up to mischief comes from everyday talk where up to means 'busy with' and mischief means playful trouble. Picture a quiet child sneaking around doing small naughty things; they are literally 'up to' trouble, so the phrase means 'engaged in playful or mildly troublesome behavior'.