When you get a boner over an Indian girl,
or
When your cock stinks of curry after fucking an Indian girl.
"Man I fucked this bird last night, I got a Bhuna Boner"
"Ngl im getting a Bhuna Boner over that girl"
A Tuesday when a Bhuna must be consumed.
All bhunas count: lamb bhunas, chicken bhunas, prawn bhunas, house special bhunas...
Let's go for an Indian, it's Bhuna Tuesday!