The act of a woman performing oral sex on a man, whilst squeezingly upon his scrotal sack vigourously and intently. To complete the act, the man then ejaculates on the top of the woman's head, to create a 'Halo' effect.
Here hen, fancy being my Bagpiping Angel? Sure thing babe.. best shampoo ever!
Where the man puts his penis in a girls armpit, whereupon she proceeds to lift her arm up and down, like she is playing the bagpipes. This act is known as Bag-piping.
"We had a nudy ceildhi last night and had a goodoletime Bag-piping"