To apply pressure to one's partner's sphincter during sex in order to gauge their reaction. If they react positively, then one has implicit permission to insert a finger or thumb into the anus. On the contrary, if one's partner reacts negatively, then access to the anus has been denied.
Guy 1: So I was banging this chick from behind the other night, and I rang her bell with my pinky finger.
Guy 2: haha, we know what happens when you ring the bell
Guy 1: yeah, she moaned heavily, so I slipped it right in there and came buckets.
a vegetable extract containing tannin, esp. one (also catechu) obtained from the heartwood of an Indian acacia tree, used chiefly for tanning and dyeing. • The chief source of this is Acacia catechu, family Leguminosae.
ORIGIN late 17th cent.: modern Latin, from Malay kacu. Compare with cachou .
The garment was dyed with cutch and the color was preserved with lime juice.