(not) know the first thing about (something)

to not know anything about a particular subject.

I don't know why you're asking Rob, he doesn't know the first thing about classical music.

• would see in hell before would
• would see in hell before would do something
• would see in hell before you would
• would see in hell before you would do something
• would see someone in hell before would
• would see someone in hell before would do something
• would see someone in hell before you would
• would see someone in hell before you would do something
• wrap around little finger
• wrap around your little finger
• wrap in the flag
• wrap round little finger
• wrap round your little finger
• wrap someone around little finger
• wrap someone around your little finger
• wrap someone round little finger
• wrap someone round your little finger
• wrap someone up in cotton wool
• wrap up
• wrap up in cotton wool
• wrap up something
• wrap yourself in the flag
• wreak havoc
• wrestle with
• wrestle with something