1) To be really good.
2) As replacement to okay or great.
Note: Usually said with half-hearted meaning or sarcasm OR with little or no interest in the subject of the conversation.
Example 1
Boy: Sir, is this alright?
Mr. Lowis: Yeah proper smickles
Example 2
Boy: How would you answer this question sir?
Mr. Lowis: If you need to ask that after all these lessons you are clearly not paying much attention.
James L.: Sir it's easy! You're just stupid!
Mr. Lowis: Laughter
Boy: So would it be alright if I answered it like this?
Mr. Lowis: Yep, proper smickles.
Standing Ovation
When your testicles,balls,nuts,gonads etc. are frozen. You have "nut sickles". This can be an extremely painful condition that can be relieved by immediate thawing.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.