The release of an egg from an ovary; occurs once a cycle though not always at the same time and definitely not at the same time for every woman.
Also called menstruation or menses, this is the time of your cycle you are most familiar with. The uterus sheds all but the base layer of it’s endometrium and this detached layer of tissue and blood flow out through the vagina for 3-5 days (some longer, some shorter).
Crotchety, snappish; sarcastic impertinent, or irreverent in tone or manner (Merriam-Webster) Rudely sarcastic or disrespectful; snide (American Heritage Dictionary)
When referring to internet comments: an attempt to advertise, solicit, or otherwise promote goods and services (Michael Hyatt)