1. To shut up. 2. To become a clam. Example: 1. When the teacher asked Alison to be quiet, she obliged, and beclammed. 2. The wizard waved his wand, and exclaimed, I will beclam thee and stew thee in my metal pot .
BECLAM
Meaning of BECLAM in English
Slang English vocab. Английский сленговый словарь. 2012