Safety pin

Typically a metal cotter pin like device for keeping a land mine or hand grenade from going off, however in this case it is
used as a synonym for a companion who keeps you calm or from getting upset or "exploding with anger or lashing out'.

"Please stay with me you can be my safety pin.."
(used in Korean movie 'its ok not to be ok)

where military service is required by all and understand how these war devices work

7 pin

The thing that Griffin always misses and then crawls into a ball and cries like a little baby

Griffin went on a date with the 7 pin because Trinity doesn’t like him

Pin Fretting

The uneasy feeling one gets at an ATM whlie people are behind you. You have the odd feeling someone may steal your Debit Card or Credit Card PIN number while typing it.

So many of us were at the ATM...everyone was Pin Fretting.

Pin-eyed

"Pin-eyed" in law-enforcement and street circles in the US usually refers to the contraction of pupils, a common side effect of opiate use. This could be Heroin or Oxycodone etc.

He is a pin-eyed motherfucker. Is the same as calling one a junkie.

as neat as a pin

to be dressed up to the nines; to be dressed up and looking nice.

wow. You look as neat as a pin. Are you going out tonight?

pin porn

Porn that depicts the use of a tiny 'pin' sized penis. Usually in order to make the viewer feel superior about their incredibly small penis.

Paddy: "I don't like porn all the blokes have got a bigger cock than me"

Mick: "you should look at pin porn, makes me feel like I've got a Godzilla dick"

pin dropper

A “hoe” or someone who is too flirtatious with others

that girl is such a pin dropper