an embarrassingly tactless person who acts and speaks as though they are significantly more high-class than they really are.
"Simon speaks so eloquently and with such great articulation. He wears those weird shirts with elbow patches, too... He seems to be really posh."
"Simon? Posh? Ha! No... He grew up just as poor as we did. He just became faux posh when he got the gig on that YouTube channel."
Chiefly in British English: Masturbating with a condom on.
She flaked last minute so I ended up having a posh wank instead.
Masturbation with a condom
I had a fat posh wank yesterday.
Placing an ecstasy pill on your tongue, then proceeding to eat out a girl. During this the pill is transferred from the persons tongue into the girls vagina. Thus causing her to ping while being eaten out.
Person 1: "So how did that party go on the weekend?"
Person 2: "It was crazy, met this girl and we had some pills left over so gave her a posh rave"
The act of having a tiny penis and lasting 50 minutes when receiving a blow job whilst being called daddy.
Posh: suck me off
Millie: okay, daddy
50 minutes later
Posh:I'll finish myself off you bit me now I have performed the posh palker
Other than refering to the celeb couple, this can refer to sex.
In a way similar to dog and bone, created by taking a word that rhymes with sex (becks) and adding a related word (posh), making "sex" become "posh and becks".
Lets run up the stairs for some posh and becks.