First thing that comes to your head

Opportunity

 

Knocks

 

Knock yourself out!

 

Knock, knock.
Who's there?
Opportunity.
Opportunity who?
When opportunity knocks, just answer.

 

Can't make up what you pass up

 

Carpe Diem

 

What of the heckings.

Edit:
Was supposed to be a reply, not a quote. I've been away from this site too long and my brain is on strike.
Carry on.

 

Heck yeah!

 

Gosh-darn it to heck!

(All your mild-as-milk swearwords are belong to us) ;P

 

cheese & rice

 

mac & cheese

 

mac & cheese with chicken

 

Yankee Doodle ♫ and called it macaroni ♫

 

James Cagney

Spoiler: Yankee Doodle Dandy

 

Gangster

 

Capone

 

Valentine's Day Massacre

 

Goombah

 

Godfather ... and oranges

 

Orange peel

 

Oranges and Lemons

 

Liberty

 

Democracy

 

Two wolves and a sheep discussing what's for dinner.