Bumptious

Bumptious
Adjective

Def: Pushy; obnoxiously self-assertive
pushy, aggressively forward in manner

Pricilla, the new girl in school, had a way of being overly and obnoxiously self-assertive. She pushed herself on to everybody, making her existence very well know. But her bumptious attitude caused others to not want to spend time with her. They thought her too pushy and did not make any attempts to befriend her.