When a naked female sits on the shoulders of a naked male and chokes him with her thighs as he jerks off, eventually causing him to pass out as he cums.
A chewbacc in a headlock is a sex act where a man with a completely un-trimmed bush fucks a woman until he is about to climax...then he pulls out, sticks it in her mouth, grabs her head and forces her to take his cum and bite all his pubes off.