11 Feet 6 Inches

2 sexainches.
Because 69 x 2 = 138.

Me: I thought Robert Wadlow was tall.
You: Well it was claimed that the Giant of Castelnau was 11 feet 6 inches tall.
Me: That’s 2 sexainches.

6 feet

What you say to someone who is violating your personal space out of aggression or stupidity. From the 80's street slang, you want them at least 6 feet away. Today, science reconfirms that mandate.

You and some friends are smokin a doob and some wannabe sidles up, all smiley and shit.
You: Hey, 6 feet fuckhead!