Freudian nip slip
When you mean to flash someone a nipple but you accidentally flash your bait & tackle
He gave us the old Freudian nip slip and we all got a big peak at his one-eyed willy
Freudian Selfie Nip Slip
An accidently explicit self taken photograph revealing the senders true intentions.
She sent me a freudian selfie nip slip and I knew it was on.