One does not simply not define this phrase.
One does not simply come up with an example of one does not simply.
An erection, especially in response to an attractive person.
When the blonde with the 36DD chest walked by his table, Bob was embarrassed he had given her the one-gun salute.
Poisonus snake that when aroused spits out a venumous white fluid.
He has a dangerous one eyed snake
Aka shemale.
Only has one hole in the nether region. Missing a vagina, still has the penis attached.
First Guy: "Wow man, she's hot!".
Second Guy: "Dude, she's a one hole babe!".
Fast moving to the top. Going all the way to number one as if attached to or accompanied by a bullet. A reference to the Billboard top 100 songs where a fast moving track was accompanied by a 'bullet' icon on the chart. Inspiration of the AC/DC lyric "Number One with a Bullet. I'm A Power Pack."
"That new Ice Cube track ain't just a number one, it's number one with a bullet!"
To have a shit, especially if caught short and no conventional toilet is available necesitating that the said shit is delivered from a low height, such as in the woods.
Extendible however to any situation where a person has removed themself in order to defecate.
Where has your wife gone?
Oh, she has just gone to coil one down, she will back shortly.
The name given to girls that aren't popular but have boyfriends that are sort of known by everyone.
"Dude, who's that? I haven't seen her like... EVER. Where the hell did she come from?"
"I think that's That One Guy's Girlfriend, you know, the one that looks like Harry Potter? She's been in the same school as you since 3rd grade, man. Seven whole years."
"No fucking way... Huh..."
And they both continue on their way, only to forget about her.