From Longman Dictionary of Contemporary Englishfasten onto somebody/something (also fasten on to somebody/something) phrasal verb1 to give particular attention to something because you think it is important or interesting2 FOLLOWto follow someone and stay with them, especially when they do not want you to SYN latch onto somebody The dog seemed lost and fastened onto us. → fasten→ See Verb table
Examples from the Corpus
fasten onto • It's like something you fasten on to in times of confusion and it snowballs out of hand.• She wept through the funeral, and when the lid was fastened on to the coffin, she screamed. 