chisel in

Verb

 * 1)  To barge in on something; to be a third wheel; to insinuate oneself into a situation or relationship; to get oneself involved in something.
 * 2)  To unfairly push in on (something); to gain a role in (something unsavory); to acquire a partial interest in (something) through deceit.
 * 1)  To unfairly push in on (something); to gain a role in (something unsavory); to acquire a partial interest in (something) through deceit.