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(P)ayor Swaption = (P)ut Option

Swaption rate is always the Fixed Rate so:

(P)ayor Swaption is alway an option to (P)ay fixed rate.

Just remember to match up the P's

Receiver Swaption is just the opposite, if you geta Q on Receiver Swaption - figure out what a Payor Swaption would be and the Receiver does the opposite.

ie. Q asks what a Receiver Swaption is, then think:
"Ok, a payor swaption is a put, so a receiver is a call - alway use fixed rate so receiver is a call on the fxed rate!"