This is an acronym for 'Bring Back The Weekend' and can be used on Mondays for people that miss the festivities that graced their previous weekends. #FMondays.
Damn!!!! I have to submit my class project today!!! #BBTW
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.