стебаться

Etymology

 * likely a cross between dialectal, and . The former may be an alteration of , or could be denominal from , i.e. used as a whip.

Verb

 * 1)  to make fun of someone, to ridicule, to mock, to tease
 * 2)  to joke, to kid, to josh, to banter

Conjugation
or more colloquial/childish