1To tear something to pieces or tear up (by hand); to rip or shred (paper, cloth, etc.).
子どもがチラシを嬉しそうにちぎって遊んでいる。
The child is happily tearing up the flyers to play.
怒ってその手紙を千切って捨てた。
Angrily, (he) tore the letter to pieces and threw it away.
包装紙をちぎってゴミ箱に捨てた。
I tore the wrapping paper and threw it in the trash.
2To pick or pluck (fruit, leaves); to tear off (from a branch or stem).
庭でいちごをちぎって食べた。
I picked strawberries from the garden and ate them.
彼女は花束から枯れた花をちぎった。
She tore off the wilted flowers from the bouquet.
3A colloquial suffix attached after the -masu stem of a verb to indicate doing something vigorously or to the extreme.
彼は笑いちぎるほど面白い話をした。
He told a story so funny that we laughed our heads off.
彼女は歌いちぎって観客を魅了した。
She sang with all her might and captivated the audience.