(UK, typically in the negative) shy; reluctant to share one's views

Third-person singular simple present indicative form of bend over backwards

present participle of bend over backwards

simple past tense and past participle of lean over backwards

simple past tense and past participle of bend over backwards

Third-person singular simple present indicative form of lean over backwards

present participle of lean over backwards

simple past tense and past participle of lean over backwards

An inference algorithm for hidden Markov models which computes the posterior marginals of all hidden state variables given a sequence of observations/emissions. It uses dynamic programming to compute the values in two passes, the first going forward in time and the second backward.

(simile, UK, informal, humorous) To look extremely disheveled.