not know B from a battledore

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Related to battledore: battledore and shuttlecock, stinkhorn

not know B from a battledore

To be really stupid, or perhaps illiterate. The now-outdated term "battledore" was often used in reference to a children's primer. It was likely used in this phrase simply for the sake of alliteration. How do you manage to burn pasta? It's like you don't know B from a battledore.
See also: know, not
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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References in periodicals archive ?
Battledore insertion of cord was also found to have increased association with placenta previa, abruptio placentae, preeclampsia, preterm delivery, cord prolapse, foetal distress, increased incidence of emergency LSCS, low Apgar score, NICU admission, low birth weight and congenital malformations (8, 9).
Battledore placentae were associated with the anomalies of placentae as well as related to abnormal conditions of the mother and foetus.
The item called The British Battledore (dimensions 14.3 x 8.2 cm) is, in fact, a hornbook printed on thick cardboard and contains exactly the same text described above, though enlarged and bordered on all four sides by illustrations for each of the capital letters of the alphabet.
Battledore and shuttlecock is simply played by two hitting a shuttlecock backwards and forwards with a simple bat or small racquet as many times as they can allowing it to hit the ground.
Yukio Minamikawa, head of a guild of battledore makers and sellers at Sensoji temple, said he expects many customers to visit the place and buy the battledores during the event.
Insertion of cord was eccentric 68%, central 24%, battledore 6% and velamentous 2% in IUGR group as compared to 90% central and 10% Eccenteric in control group, i.e.
Bay Gardene (EG) 28 24 Bay Gardene (BG) 69 25 Battledore Reef (BA) 1,419 26 * Horseshoe Reef (HO) 158 27 ([section]) Lake Fortuna (LF) 2,144 28 Wreck (WR) 2,276 29 ([parallel]) E.
There will also be the chance to find out more about Yorkshire traditions such as Easter skipping and battledore and shuttlefeather 'fortune telling' as well as simple colouring activities.
3.Which piece of sporting equipment was once called a battledore?
Children will be able to experience the fun of long forgotten traditional games including hopscotch, skittles, croquet, quoits, battledore and shuttlecock together with a selection of other activities including a bug hunt around the grounds.
Which modern sport was developed from the game once known as battledore?
Arthur's trio on Town Moor are hurdler Mid Day, novices' chaser Pravona and Battledore in the long-distance chase.
The ''Princess Masako'' battledore shows the crown princess carrying a baby, celebrating the birth Saturday of the first child to her and Crown Prince Naruhito.
May I take up the dialectic battledore which you have just laid down?'
Hamilton Boyd (5) and Mossman (5) have described the attachment of cord as central, eccentric, marginal (Battledore Placenta) and rarely velamentous.