ichibiru

to mess around too much; to be unable to sit still

Word type: u-verbs

Standard: ちょうしにのる/ふざける

Standard kanji: 調子に乗る/ふざける

Example:

あいつ、最近、いちびってるなあ。
Man, he really hasn't been able to stop screwing around lately, has he.

Commentary:

Also see いちびり.