a biker
просторечный американизм
мотоциклист, велосипедист
4 bikers roared by and woke up the baby
4 мотоциклиста с рёвом промчались мимо и разбудили ребенка
The Future Perfect Continuous Tense в английском языке

Fun Facts
A chicken will lay bigger and stronger eggs if you change the lighting in such a way as to make them think a day is 28 hours long!