expression, godan verb (-ru)
act like an equal; put on airs of equality
Colloquial expression used when someone, often a younger or lower-status person, behaves as if they are on equal footing with someone they should defer to. Often carries a negative or mocking tone.
後輩のくせにタメ張るなよ。
Don't act like you're my equal when you're my junior.
彼はすぐ先輩にタメ張ろうとするから嫌われる。
He's disliked because he always tries to act like he's on the same level as his seniors.