ておく (do something in advance, or leave it as it is) fuses into とく: 言っておく → 言っとく, 置いておく → 置いとく. Comedians love 言っとくけど, “let me tell you”, right before a ridiculous claim.
Use it withFriends OKCoworkers OKBoss / teacher careful
Everyday speech. 言っとくけど (“just so you know”) can sound like a warning.
114 lines with 〜とく from 64 comedians in the library · the textbook 〜ておく: 155 · Counts updated 2026-10-07
A performer looks back on doing sketches over and over with a partner named Hiro.
The words appear when the audience laughs.
最初の1分間医者として振っといて
for the first minute, we'd set it up like it's a doctor,
Textbook最初の1分間は医者として振っておいて、実はただの一般人だったというコントでした。「振っておいて」 → 「振っといて」: 「ておく」 ('do ahead') contracts to 「とく」, so 「ておいて」 becomes 「といて」, setting up the premise first.
〜とく means “do it ahead / leave it”. ておく (do something in advance, or leave it as it is) fuses into とく: 言っておく → 言っとく, 置いておく → 置いとく. Comedians love 言っとくけど, “let me tell you”, right before a ridiculous claim.
Is 〜とく rude? Who can you say it to?
With friends: OK. With coworkers: OK. With a boss or teacher: careful. Everyday speech. 言っとくけど (“just so you know”) can sound like a warning.
〜とく or 〜ておく: which do people say more?
In 1,905 live comedy routines, 〜とく appears in 114 lines from 64 comedians, and the textbook 〜ておく in 155 lines.