Answer: hopon

AnswerCrossword Clue
HOPON

".. Pop" (Seuss classic)

HOPON

Board, as a bus

HOPON

Motorcyclist's invitation

HOPON
".. Pop" (Seuss book)
HOPON
"Come aboard!"
HOPONBoard, in a way
HOPONJoin a bandwagon
HOPONBiker's invitation
HOPONBoard
HOPON"Sometimes, when I sleep at night, I think of '... Pop'" (Dubya, April 2, 2002)
HOPONBoard, as a trolley
HOPON"All aboard!"
HOPONBiker's invite
HOPONBiker's welcome
HOPONHayride invite
HOPONBoard, as a cable car
HOPONLeap aboard
HOPONBoard a trolley, perhaps
HOPONJump: 2 words.
HOPONScold: Slang.
HOPONScold severely: Slang.
HOPONGet aboard.
HOPONClimb aboard.
HOPONDr. Seuss's "... Pop"
HOPON"... Pop," Seuss book
HOPONBiker's invitation to a friend
HOPONCyclist's offer
HOPONBoard, informally
HOPONBus driver's solicitation
HOPON"... Pop" (Dr. Seuss classic)
HOPONInvitation to join a hayride
HOPONBoard a moving vehicle