Intransitive phrasal verb
The way someone "goes up and down" refers to their physical appearance. It is usually used in positive phrases to show strong approval of somone's overall look. It means you wanna get freaky with that person coz they are fine and dress good, but classy.
A quote from Jacob Andrews. Said first in a Drawfee stream, making a joke when talking about a bible verse where a child tells an old man to “go up bald head”. It’s meaning is basically a young person making fun of an old boomer.
“Ben have you done your homework yet?”
“Go Up Baldy!”
“The other day my kid told me to Go Up Baldy, I think they’ve been watching that drawing show too much.”