What is "to bundle up"

Bundle \Bun"dle\, v. i.

1. To prepare for departure; to set off in a hurry or without ceremony.

2. To sleep on the same bed without undressing; -- applied to the custom of a man and woman, especially lovers, thus sleeping.
   --Bartlett.

   Van Corlear stopped occasionally in the villages to eat pumpkin pies, dance at country frolics, and bundle with the Yankee lasses.
   --W. Irving.

   To bundle up, to dress warmly, snugly, or cumbrously.