Hitting upon that "sweet spot" or position that does it so completely for your partner they flip their noodle; for about (an hour) they will revere you as a god/dess.
Bullseye- idiom, strong affirmation of a statement or action. Verbal confirmation that a bad-ass or spot-on action or statement that has just occurred.
Other forms include- so bullseye, that's so bullseye, fuckin-a-right bullseye.
Todd fucked that dude up after Henry threatened him with a gun, compelling Abbi to reply 'that's so bullseye' & Sadie to post the caption 'fuckin-a-right bullseye' on her gay instagram account.
To drop a turd in the toilet with such precision that the water splashes straight up and hits the anus. Much a kin to a perfect dive that splashes up and makes no ripples in the water.