bum rush
A storming into an establishment.
VERB + BUM
feel, pinch
She felt his hand pinch her bum as she pushed through the crowded subway car.
sit on
If you sit on your bum all weekend, you'll feel lazy and stiff.
ADJ
low-down, no-good | lazy
beach
She spent the summer as a beach bum, surfing every day and sleeping in her van.