something that is objectively meaningless according to the person telling you this phrase but meaningful (and relevant) to everyone else you know (the 'everyone you know' includes most people in your generation/age range/social category)
boy 1) my mother says that smoking Mary Jane is meaningless
boy 2) just ignore your old lady. her opinion is subjectively meaningless but meaningful to idiotager or idiotagers in our class.
This term is slang and refers to a female erection upon waking up in the morning. These erections are perfectly normal and occur when neurological stimulators cause blood to flow into the clitoris during REM sleep. This ensures that oxygen is properly delivered to the clitoris and helps keep clitoral tissue healthy.